Tail pipe extension



Dec. 5, 1961 E. C. SEILS, JR

TAIL PIPE EXTENSION Filed Jan. 17, 1958 INVENTOR. Zyvdr/ C 5e z'/s', .72

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3,011,524 Patented Dec. 5, 1961 United States Patent ice present invention in the form of a tail pipe extension 3. The extension 3 is a piece'of cylindrical tubing having an outlet end 5 with an opening that is somewhat less in diameter than the LB. of the tubing because of a turned in rim formed at the end of the tube. The inlet end of the extension has an opening 7 which is preferably of the same size as the ID. of the tubing. This is somewhat larger than the diameter of the tail pipe 1 My invention relates generally to sockets, connectors, as can be seenin FIGS. 1-3. and couplings and concerns an improved method of fric- 10 In order toconnect the extension 3 to and mount it tionally attaching such members to other members fitting on the tail pipe 1, a plurality of flaps 9 are formed in within them. While the invention is not so limited, it the wall of the extension 3 to extend radially inwardly has a particularly valuable application in tail pipe exand engage the outer surface of the tail pipe 1. Each tensions. flap 9 is preferably triangular in shape and is bent out It is an object of this invention to provide a tail pipe from the wall of the tubing. The flaps are each formed extension which is simple to assemble on the tail pipe. by shearing along two sides of a triangle, preferably Another object of the invention is to provide a tail a right-angle triangle. The sheared sides or legs are pipe extension which will automatically center itself on identified by reference numerals 11 and 13. Each flap the tail pipe. Another object of the invention is to; provide a tail so that it makes an angle A which is preferably at least pipe extension which is universal in the sense that it can 45 with a tangent to the periphery of the tube at the 3,011,524 TAIL PIPE EXTENSION Edward C. Seils, Jr., Racine, Wis., assignor, by mesne assignments, to Walker Manufacturing Company, Racine, Wis., a corporation of Delaware 5 Filed Jan. 17, 1958, Ser. No. 709,513

7 Claims. (Cl. 138-465) be ,used-; on tail pipes *ofsubstantiall different s. ase 1m 15. It w ggt ed that the base lines 15 of on pipespresentin-gpoofsurface coii'clitioii's. i 1 s" y run parallel to the axis of the Another object of the invention is to provide a tail extension 3 while the edges 17 extend axiallybut at an pipe extension that may be adjusted to different positions angle to this axis as well as to the wall of the tube." The lengthwise of the tailpipe. sharp edges 17 of each flap engage the surface of the It is also an object of the invention to provide a tail tail pipe 1 and the three sharp edges 17" together detail pipe extension which is locked in place but which can fine a conical surface which is widest near the inlet end be removed by forces properly applied. 7 of the extension and smallest toward the outlet end. Another object of the invention is to provide a tall This conical surface can expand radially inasmuch as pipe extension design which may consist of only one the flaps 9 are transversely flexible and can yield resilipiece of material having no screws, springs, or other ently in an outward direction by bending about their separate parts. bases 15. The flaps 9 may also twist a little in the course Another. object of the invention is to provide a tail of expansion when the extension 3 is forced upon atail pipe extension which tends to absorb vibration and shock pipe I. and to resist rattling or loosening. It is apparent from FIGS. 1 to 3 that the tail pipe It is also an object of the invention to provide a tail extension 3 can be applied by simply forcing it on the pipe extension which exerts radially directed pressure tail pipe.1. 'This is done by inserting the tail pipe in the on the tail pipe that is substantially balanced around the opening and using suitable instruments, such as a piece circu'mference'of't he tail pipe. 40 of wood and a brick, to tap the tail pipe extension 3. in It is also an object of the invention to provide a tail a longitudinal directiononto the pipe 1. When this is pipe-extension having line contact .with the tail pipe. done the outer end of the tail pipe 1 will engage the It is an object of the invention to provide a tail pipe sharp corners 17 of the flaps at points along the lengths extension which can be assembled and disassembled withof the fiaps which depend upon the diameter of the pipe out any special tools. 1. Additional axial pressure on the extension 3 will re- It is a further object of the invention to provide a sult in expansion of the conical surface defined by the tail pipe extension which can be manufactured at a minilines 17 which is accommodated by bending and twisting mum cost and which can be made from scrap pieces of of the flaps 9. The sharp edges 17 dig into the surface tubing. of the tail pipe 1 and provide a tight grip on it. When It is also an object of the invention to provide a tail the extension 3 has been moved axially to the desired pipe extension which can be used more than once. position, the flaps 9 will automatically hold it locked As indicated previously, the invention can be utilized in place against any undesired movement relative to the in devices other than tail pipe extensions, hence the forepipe 1 and it will not be possible to directly pull the going objects are applicable thereto and the accompanyextension 3 olf the tail pipe 1 because the heels 19 of ing drawings showing the invention embodied in a tail the flaps 9 will dig into the surface of the pipe and act pipe extension are illustrative only of the principles of as ratchet teeth to prevent removal. However, if it is the invention. desired to remove the extension 3, this can be done by In the drawings: simultaneously turning it in the direction of the arrow FIGURE 1 is a side elevation partly broken away of 21 in FIG. 3 and pulling it off the pipe 1, it being a simple form of tail pipe extension embodying the inevident that no tools are necessary for this operation. vention, the tail pipe being shown entering the tail pipe FIG. 4 shows a modified type of tail pipe extension extension in phantom lines; embodying the invention. In this extension the body 31 FIG. 2 is an end elevation partly in section taken from is oval in shape. There are four flaps 33 extending into the right of FIG. 1; the hollow interior of the extension. These flaps are of FIG. 3 is an end elevation with a tail pipe inserted in the same construction as the flaps 9 and will function in a the extension and shown in section; and similar manner to mount the extension upon and secure FIG. 4 is an end elevation of a different form of exit to a suitable tail pipe. tension cross section. It will now be realized that I have provided an ex- A tail pipe or other device to be received within the tremely simple type of connection between an outer memsocket type connection or coupling of this invention is ber and an inner member. Insofar as tail pipe extensions indicated in the drawings by the reference numeral 1. are concerned, the invention provides a very inexpensive Attached to the tail pipe 1 is a member embodying the design which can be mounted upon and properly centered is folded along the base 15 of the triangle and is bent on various size tail pipes and on tail pipes having various surface conditions. The sharp line contact between the resilient flaps and the tail pipe enable the flaps to dig in and provide a firm grip on the tail pipe that resists relative movement. The flaps 9, being resilient, provide a means for absorbing shock and vibration. The length of contact along the fiaps 9 is substantial and prevents non-axial canting of the extension on the pipe. Since the flaps 9 are resiliently deformed they will spring back into the original position when the tail pipe extension is removed so that the extension can be used again. Obviously, the unit can be assembled and disassembled without any special tools; and, in fact, nothing but hand pressure is needed for removal.

It is apparent that modifications can be made in the specific structure that has been illustrated herein. For example, the unit of FIG. 3 could be a part of a more elaborate design of tail pipe extension, or the unit could be used for applications other than tail pipe extensions.

I claim:

1. In a tail pipe extension, a tubular member, a plurality of flaps formed in the wall of the tubular member, said flaps each being triangular in shape with the base thereof integral with said wall and the other two sides sheared from said wall, said flaps being deformed inwardly at an angle to said wall and having inner edges defining an expandable conical surface.

2. A tail pipe extension comprising a tubular member having a wall to fit over a tail pipe, mounting members formed integrally with the wall of the tubular member and extending inwardly therefrom to engage the outer surface of the tail pipe, said mounting members having inner sharp edges, each said edge extending lengthwise of the member and different points along each said edge being spaced varying distances from the wall of the member.

3. The invention set forth in claim 2 wherein said edge also extends at an angle to the axis of the member.

4. An attachment to be mounted on an inner member, said attachment comprising a tubular member having a wall to receive within it the inner member, said tubular member having flaps struck inwardly from the wall thereof, said flaps being substantiallytriangular in shape, said triangular shape being substantially in the form of a right angle having a base extending parallel to the axis of the tubular member and lying in the surface of the wall thereof, the other two sides of said triangles being sheared to provide the edges of the flap, the hypotenuse of said right triangle extending axially of the tubular member with the apex end thereof at the inlet end of the attachment.

5. A connection between transversely spaced members comprising a plurality of transversely flexible wedges in the space between the members engaging one member along lines parallel to a line of reference and engaging the other member along lines extending angularly to said line of reference, said wedges being flexible so that they are transversely movable about said parallel lines as axes toward and away from the respective members.

6. A connection between concentric radially spaced cy-z lindrical surfaces comprising a plurality of flexible wedges of varying radius located in the space between the surfaces and disposed to define planes tangent to a cylindrical surface of smaller diameter than the inner of said surfaces and substantially concentric therewith, said wedges being flexible in directions normal to said tangent planes and extending lengthwise of said surfaces.

7. An attachment to be mounted upon an inner memher, said attachment comprising a tubular member in-, cluding an outer wall, bendable flaps extending in from said wall at an angle thereto and extending lengthwise of the tubular member, said flaps being bendable around axes extending lengthwise of the tubular member, said flaps each having an inner edge extending lengthwise of the tubular member and adapted to engage and grip the inner member, said tubular member being removable from an inner member by pulling and turning it relative to the inner member.

References Cited in the file of this patent UNITED STATES PATENTS 1,374,307 McKissick Apr. 12, 1921 1,391,495 Parsons Sept. 20, 1921 2,087,178 Zaiger July 13, 1937 2,509,503 Huyton May 30, 1950 2,750,963 Bond June 19, 1956 2,873,988 Bartholomew Feb. 17, 1959 FOREIGN PATENTS 1,126,301 France July 23, 1956 page 

